US Patent No: 5,127,406

Number of patents in Portfolio can not be more than 2000

Apparatus for measuring concentration of substances in blood

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Abstract

An apparatus for non-invasively measuring the concentratiuon of a predetermined substance in blood. Light of first and second wavelengths is emitted through a pulsating living tissue, either alternately of simultaneously. The amounts of light of the first and second wavelengths transmitted through the pulsating living tissue are measured for first and second different thicknesses of the pulsating tissue. A calculation is then carried out to determine the concentration of the predetermined substance based on the detected amounts of light of the first and second wavelengths when the pulsating living tissue has the first thickness, the amounts of light of the first and second wavelengths detected when the pulsating living tissue has the second thickness, and absorption coefficients of the substance and absorption coefficients of water at the first and second wavelengths.

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First Claim

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Patent Owner(s)

Patent OwnerAddressTotal Patents
NIHON KOHDEN CORPORATIONTOKYO223

International Classification(s)

Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Yamaguchi, Kazuo Holzgerlingen, DE 84 767

Cited Art

Patent Info (Count) # Cites Year
 
MINOLTA CAMERA KABUSHIKI KAISHA (2)
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NELLCOR PURITAN BENNETT INCORPORATED (2)
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FIRST BANK NATIONAL ASSOCIATION (1)
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MSA (1)
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PURITAN-BENNETT CORPORATION (1)
4,883,353 Pulse oximeter 159 1988
 
THE BOC GROUP, INC. (1)
4,407,290 Blood constituent measuring device and method 284 1981

Patent Citation Ranking

Forward Cites

Patent Info (Count) # Cites Year
 
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